A couple came into the shop who had just moved into the area from America and were looking for a grain-free dog food with a minimal number of ingredients that was preferably turkey based. They mentioned a company they had bought from in America but as far as we could work out it was not available in the UK. After a fair bit of work and reading of ingredient lists we settled on James Wellbeloved grain-free Turkey. The couple paid and left, however 10 minutes later one of them came back and asked if they could leave the food on the counter for an hour or so as they wanted to get a coffee and stroll round the shops and apparently carrying a 1.5 kilo bag of dog food was a problem. No problem for us except they never came back for it. So how long do we hang onto a bag of food that someone paid for but not has not collected before we put it back out for sale?